As it's name suggests, major depression has influence over almost all of your activities which you might have seen in the symptoms of depression in the categories. It effects your sleep, you will not sleep as you once used to do, it will have influence over your studies, you will face a lot of problemswhile you study e-g you are learning something again and again but you can't focus on it, you are watching the book but your mind is somewhere else in the world of your thoughts, the major symptom that is seen and which everyone dislikes is that you don't get pleasure from anything, as once you used to did.

Some people have depression for some limited time while some people face the recurrence of depression.